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The other end of my diagnostic code: Rolo now tries to load the file "/startup_io.bin" and restores the I/O space from there, if present. Use a file created from not-flashed for testing.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3917 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2003-08-04 18:41:13 +00:00
parent f6b3ced63e
commit e9b12dd9eb
1 changed files with 54 additions and 0 deletions
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54
firmware/rolo.c
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@ -30,6 +30,54 @@
#define IRQ0_EDGE_TRIGGER 0x80
/* test code, to be removed later */
extern union /* defined in main.c */
{
unsigned char port8 [512];
unsigned short port16[256];
unsigned port32[128];
} startup_io;
bool rolo_io_load(char* filename)
{
int fd;
fd = open(filename, O_RDONLY);
if(fd >= 0) /* no complaint if it doesn't exit */
{
read(fd, (void *)&startup_io, sizeof(startup_io));
close(fd);
return true; /* success */
}
return false; /* not found */
}
void rolo_io_restore(void)
{
int i;
for (i = 0; i < 512; i++)
{ /* most can be written with 8 bit access */
*((volatile unsigned char*)0x5FFFE00 + i) = startup_io.port8[i];
}
/* some don't allow that, write with 32 bit if aligned */
*((volatile unsigned char*)0x5FFFF40) = startup_io.port32[0x140/4];
*((volatile unsigned char*)0x5FFFF44) = startup_io.port32[0x144/4];
*((volatile unsigned char*)0x5FFFF50) = startup_io.port32[0x150/4];
*((volatile unsigned char*)0x5FFFF54) = startup_io.port32[0x154/4];
*((volatile unsigned char*)0x5FFFF60) = startup_io.port32[0x160/4];
*((volatile unsigned char*)0x5FFFF70) = startup_io.port32[0x170/4];
*((volatile unsigned char*)0x5FFFF74) = startup_io.port32[0x174/4];
/* write the rest with 16 bit */
*((volatile unsigned short*)0x5FFFF4A) = startup_io.port16[0x14A/2];
*((volatile unsigned short*)0x5FFFF5A) = startup_io.port16[0x15A/2];
*((volatile unsigned short*)0x5FFFF6A) = startup_io.port16[0x16A/2];
*((volatile unsigned short*)0x5FFFF7A) = startup_io.port16[0x17A/2];
}
/* end of test code */
static void rolo_error(char *text)
{
lcd_clear_display();
@ -55,6 +103,7 @@ int rolo_load(char* filename)
unsigned short checksum,file_checksum;
unsigned char* ramstart = (void*)0x09000000;
void (*start_func)(void) = (void*)ramstart + 0x200;
bool restore_io; /* debug value */
lcd_clear_display();
lcd_puts(0, 0, "ROLO...");
@ -122,6 +171,8 @@ int rolo_load(char* filename)
return -1;
}
restore_io = rolo_io_load("/startup_io.bin"); /* test code, recycle a variable */
lcd_puts(0, 1, "Executing ");
lcd_update();
@ -135,6 +186,9 @@ int rolo_load(char* filename)
i2c_init(); /* Init i2c bus - it seems like a good idea */
ICR = IRQ0_EDGE_TRIGGER; /* Make IRQ0 edge triggered */
if (restore_io) /* test code */
rolo_io_restore(); /* restore the I/Os from the file content */
/* move firmware to start of ram */
for ( i=0; i < length/4+1; i++ )
((unsigned int*)ramstart)[i] = ((unsigned int*)mp3buf)[i];